On the early morning of January 4th, something hit and mangled a giant 290-foot-tall wind turbine in Lincolnshire, England. One of its three 65-foot blades was completely severed while another was left dangling like a wilted flower petal. Officials have cordoned off the wind farm (which seems only to be fueling the UFO theories) but have not been able to identify what hit the turbine—or, at least, they’re not willing to say.

Some people in the area report seeing bright orange spheres of light “with tentacles” streaking across the sky towards the wind farm around the time of the crash. UFO flares? Actually, they were the celebratory fireworks from the 80th birthday party of local resident, reports the Guardian.

Of course, UFO enthusiasts are having a ball with this one. But aside from a many-tentacled alien Don Quixote, other, slightly more rational suspects include a possible lightning strike, a meteorite, a robot stealth bomber on a test flight, a cow-sized ice chunk, or material failure. We’re also going to throw in revenge of the bats.

I will admit, the lightning strike, meteor and robot stealth fighter on a test flight all seem plausible. But a cow sized chunk of ice? I thought you only got chunks that big up in the arctic, and none of them has been taken airborne as far as I know. So unless global warming has gone REALLY out of whack, I think I’ll stick to one of the first three explanations as the most likely.